Immense effort has been devoted to mitigating the negative effect of deforestation, one of the main factors causing global change. However, the effect of reforestation management on food-webs has been rarely studied and no study so far has investigated the effect on predator–prey interactions in forest understories. We studied predator–prey interactions in forest understories using web-building spiders in four forest types: dry evergreen forest representing a natural control and three 20–30-year-old reforestation types, namely secondary naturally regenerating dry evergreen forest, monoculture reforestation dominated by Eucalyptus camaldulensis, and mixture reforestation dominated by Acacia mangium and E. camaldulensis. We collected spiders with their prey and measured the availability of potential prey. We also measured different spider traits (web type, body size) that can be selected by various forest types and consequently affect the predator–prey interactions. The forest type influenced the predator–prey interaction in a complex way, interactively affecting spider density and prey-specific capture efficacy of spider community. The forest type also influenced the web-type and body-size distributions of spiders. Surprisingly, the prey composition caught by spider webs was related only to the web-type but not to the spider mean body size. None of the studied reforestations have yet restored the natural predator–prey interactions, which indicates that conservation management in the tropics should focus on establishing protected areas in pristine regions instead of relying on reforestation. Moreover, the food-web models need to incorporate not only body sizes but also hunting strategies of predators to improve their predictive abilities.

致力于减轻森林砍伐的负面影响，森林砍伐是造成全球变化的主要因素之一。但是，鲜有关于造林管理对食物网的影响的研究，迄今为止，尚无任何研究调查对森林底层林中捕食者与猎物之间相互作用的影响。我们使用网络蜘蛛构建了四种森林类型，研究了林下种之间的食肉动物与猎物之间的相互作用：代表自然控制的干旱常绿森林和具有20-30年历史的三种再造林类型，即次生自然再生的干旱常绿森林，以单一种植再造林为主桉树和马占相思和樟树的混交林为主。。我们收集了蜘蛛及其猎物，并测量了潜在猎物的可用性。我们还测量了各种森林类型可以选择的不同蜘蛛特征（网状，体型），因此会影响食肉动物与猎物的相互作用。森林类型以复杂的方式影响食肉动物与猎物的相互作用，从而相互作用地影响蜘蛛的密度和蜘蛛群落对猎物的捕获效率。森林类型也影响蜘蛛的网状分布和体型分布。令人惊讶的是，被蜘蛛网捕获的猎物组成仅与网的类型有关，而与蜘蛛的平均体型无关。尚未研究过的重新造林还没有恢复自然捕食者与猎物之间的相互作用，这表明热带地区的保护管理应着重于在原始地区建立保护区，而不是依赖于重新造林。此外，食物网模型不仅需要结合体型，还需要结合掠食者的狩猎策略以提高其预测能力。